How errors are reported, reviewed and corrected.

Report an issue

Use the contact page and include the affected URL, the value or statement in question, the expected correction and a supporting source.

Material corrections

A material correction changes the meaning of a conclusion, a reported value, a methodology description or an attribution. The page should be updated, its modified date refreshed and a concise correction note added when appropriate.

Minor edits

Spelling, formatting and clarity edits that do not change meaning may be corrected without a formal note.